From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54485C2BA83 for ; Thu, 13 Feb 2020 16:04:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 248F92073C for ; Thu, 13 Feb 2020 16:04:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581609894; bh=tE13vzKkX6J4sXB7MMn/w4zIl09xV4yZ7Qz8awEe/Cw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MrRDCmUNypwkLDhFOyfCSw5wDR+EhBXe2l3elKswtkln5nsiX9zK51VVPoNyoVo7o Z7TdIwiTFnual700lGueA8r8zf+DQBtt+bw7KBY3izVyc7w+GH4s+5TMCdeAeOmHjZ rZS/QgBg0iK1/8wVHiwgW+cIBxVsGDr1va08Mlag= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388386AbgBMQEw (ORCPT ); Thu, 13 Feb 2020 11:04:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:36314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728546AbgBMPX6 (ORCPT ); Thu, 13 Feb 2020 10:23:58 -0500 Received: from localhost (unknown [104.132.1.104]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7218224699; Thu, 13 Feb 2020 15:23:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581607437; bh=tE13vzKkX6J4sXB7MMn/w4zIl09xV4yZ7Qz8awEe/Cw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K2RjdTFcL/T5l/wzK5QkzcYiuXqCb1SWRr4ApWV3Rs1oLc67Tov6SquvOSvqDXyzR ndfYpqFVY+d/2cPQ0XDDoq07Z9rBojY+eIkvL8zSDU5otnFV/dZTLUkjwMadubJZRC jXTGLfU9/a10m/vJRJfO6c0JfeVjOcFWkBEk7nn4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Florian Fainelli , "David S. Miller" Subject: [PATCH 4.9 074/116] net: systemport: Avoid RBUF stuck in Wake-on-LAN mode Date: Thu, 13 Feb 2020 07:20:18 -0800 Message-Id: <20200213151911.753371602@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200213151842.259660170@linuxfoundation.org> References: <20200213151842.259660170@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Florian Fainelli [ Upstream commit 263a425a482fc495d6d3f9a29b9103a664c38b69 ] After a number of suspend and resume cycles, it is possible for the RBUF to be stuck in Wake-on-LAN mode, despite the MPD enable bit being cleared which instructed the RBUF to exit that mode. Avoid creating that problematic condition by clearing the RX_EN and TX_EN bits in the UniMAC prior to disable the Magic Packet Detector logic which is guaranteed to make the RBUF exit Wake-on-LAN mode. Fixes: 83e82f4c706b ("net: systemport: add Wake-on-LAN support") Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/broadcom/bcmsysport.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -1983,6 +1983,9 @@ static int bcm_sysport_resume(struct dev umac_reset(priv); + /* Disable the UniMAC RX/TX */ + umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0); + /* We may have been suspended and never received a WOL event that * would turn off MPD detection, take care of that now */